Gree U-MATCH IV SERIES, Service Manual

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U-Match Series DC
Inverter Service Manual
DPOUSPM
communication wire of wired controller must use shielding twisted wire.
5.3 Installation of Wired Controller
Firstly, the selection and connection way of wired controller’s signal wire are as below:
(1). Choose suitable signal wire: 2-core signal wire (wire diameter >=0.75mm, wire length<30m and the
recommended length is 8m).
(2).
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wired controller of indoor unit with screws; make sure the signal wire is solid.
Then, the detailed installation procedures of wired controller are as shown in Figure 2-5-2:
Figure 2-5-2 Installation of wired controller
Brief instructions of installation procedure:
1). Pull out the 2-core signal wire in the installation hole of the wall and then let this wire go through the
hole at the back of wired controller’s base plate.
2). Fix the base plate and installation hole of the wall together with screw M4×25.
3). Fix the above mentioned 2-core signal wire on the copper insert X1 and X2 with the equipped screws
of wired controller.
4). Fasten the wired controller’s panel with its base plate together.
5.4 Removal of Wired Controller
Figure 2-5-3 Removal of wired controller
6 TROUBLESHOOTING
6.1 Display of Error Code
Table 2-6-1 Error Code List
Error Code Error
E1 Compressor high pressure protection
E2 Freeze protection
E3 Compressor low pressure protection, refrigerant lacking protection, refrigerant recycling mode
E4 Compressor high discharge temperature protection
E6 Communication malfunction
E8 Malfunction of indoor fan motor
E9 Full water protection
F0 Malfunction of indoor ambient temperature sensor
F1 Malfunction of evaporator temperature sensor